/**
 * 토큰 버킷 Rate Limiter — LLM 호출 빈도 제한
 */
export declare class TokenBucketRateLimiter {
    private tokens;
    private readonly capacity;
    private readonly refillRate;
    private lastRefill;
    private lock;
    constructor(capacity?: number, refillRate?: number);
    consume(): Promise<boolean>;
    private refill;
}
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